Core and chuck



May 22, 1923. v

P. DE MATTIA' ET AL I CORE AND CHUCK Filed Aug. 6, 1921 2 SheetsSheet lWITNESSES 4 TTOR/VEYS May 22, 1923.

- v 1,456,426 P. DE MATTIA ET AL CORE AND CHUCK Filed Aug- 6, 1921 2sheets-sheet? A TTOHIVE Y S IV V E /V T098 545 THOLD DE M47174 PE -52Ds/VnrT/fl WITNESSES Paras or: MATTIA AND sAa'rnoLn DE MATT-1A, orcmrron, new Janene.

' ooan AND cnucx.

Application filed Au u e, 1921. Serial no. 490,393.

T all wiwm it may concern:

Be it known that we, PETER DE Ma'r'rmand BARTHOLD DE MA'I IA, citizensof the United.

States, and residents of Clifton, in the county of Passa'ic and State ofNew Jersey, have invented certain new and useful Improvements in Coresand Chucks, of which the following isa full, clear, and exactdescription.

The present invention relates to cores and chucks employed in themanufacture of pneumatic tires. In practice such cores and chucks aremounted upon a revoluble table forming part of a jack, and it isdesirable that they be firmly connected to the table so as to be capableof quick removal thereform,

' and that the conneotin devices while simple in operation, nevertheess, shall form anef fective connection and one not liable todisarrangement while turning the core as the tire is formed thereon.

To the above end the present inventio consists of the devices andcombinations of devices which'will be hereinafter described and claimed.

In the drawings we have illustrated in Fig. 1 a plan view of a combinedchuck and core embodying the invention. I Fig. 2 shows a detail of thelocking bolt and its operating pinion, parts being shown in elevationand parts in section, the section being taken on the line 22 in Fig.1.

Fig. 3 shows a detail of the locking bolt.

and one of the cooperating locking studs,

parts being-shown in elevation and parts in section, the section beingtaken on the line 3-3 in Fig.1. a

Fig. 4 is a top plan bolt removed. M v

Fig. 5 shows a sectional view taken through a portion of the core and,the means for operating the key section, and also the revolving tableand a portion of the jack.

Fig. 6 shows a side elevation of ortions of the chuck and core, partsbeing s own in section taken on the line 6-6 of Fig. 1..

Fig. 7 shows a sectional view through the view of the locking table, thechuck and otherparts are taken on the line 7-7 in Fig. 1.

Similar reference characters will be em ployed to designatecorresponding parts.

As shown, the core is a collapsible core comprising a fixed section 10supported upon arms li'and 12, forming an integral part of the chuck 13.It also'comprises a swinging section 14 pivotally mounted at 15 upon thearm 12, and a combined swinging and swivmovementin' a bearing carried bythe chuck,

and along, one edge isprovided with worm teeth'23 engaged by a worm 24mounted in a suitable bearing 25 and provided with a I polygonal stem26, which may be engaged by a suitablewrench whereby the worm may beturned to reciprocate the sliding bar 22 and thus move the key section20 radially into and out of operative continuity with the other sectionsof the core.

Such a core is well-known tothose skilled in this art and itsconstruction and mode of operation need not be further describe'dherein, and in and of itself it forms no part of the present invention.

A table 27 is provided with a shaft 28 which is held to revolve in abearing 29 at the forward end of an arm 30 of a supporting jack, andupon its under side is provided with a notched flange 31 arranged to beengaged by a spring pressedbolt 321 to hold the table fixed at any pointto which it may be turned.

This table and jack is also well-known to those skilled .in the art andneed not be further described, and as so far described in and ofthemselves constitute no part of the present invention;

The table 27 is provided with upwardly extending studs '32, which asshown in Fig. 3 are provided with a stem 33 which passes through thetable 27, and which at its lower portion is threaded as at 38 andreceives a threaded nut 39, the lower shouldered end 40 of the stud 32resting upon the upper surface of the table 27. Toprevent the studs fromturning in the table, dowel pins 41 The upper ends of the studs32 arebevelled or tapered as shown at 42, and they are prothe table 27 locateddiametrically opposite each other at equal distances from the center ofthe chuck, and when fixed in position the notches or slots 43 will facein the same direction and be in alignment with each other.

core and the sliding bolt 46.

The chuck 13 is provided with circular openings positioned to registerwith the upwardly extending studs 32, and to fit thereon the uppertapered ends 42 of the studs assisting in placing the openings 45 inthechuck 1,? over the studs.

The locking device which cooperates with the notched studs comprises asliding bolt 46 held beneath two overhanging projections 47 of'circularbosses 48 mountedon the chuck 13. This bolt is provided along one edgewith rack teeth 49 engaged by a pinion 50 carried by a spindle 51mounted to turn in a bearing 52'forrned in the chuck 13. The spindle 51at its upper end 53 is formed polygonal in shape whereby it may beengaged by a key or wrench to turn the same, to reciprocate theslidingbolt 46. The bolt 46 near one end is provided with a semicircular notch54, the notch being substantially the same radius as the diameter of thestuds The parts are so arranged that when the bolt 46 is moved to apoint which will bring the notch 54 opposite one of the studs 32, theopposite end of the bolt will clear the other stud, as shown in Fig. 1of the drawing. By turning the spindle 51, the rack and pinionconnection 49 and 50, causes the bolt 46 to be reciprocated so that theedge thereof will engage the slots 43 in the studs and thus lock thechuck 13' and the core mounted thereon, to the table 27. In order toinsure rigidity of connection the sliding bolt 46 at its opposite endsis provided with bevelled or wedge surfaces 55 and 56 (see Figs. 4 and7), whereby as the bolt is moved to a locking position, the undersurface of the chuck 13 will be forced into close contact with the uppersurface of the table 27. p

Preferably, the polygonal ends 26 and 53 will be of substantially thesame size and shape so that th same key or wrench may be employed tooperate thekey section of the It is thought thatthe operation has beensufiiciently described in connection with the foregoing description ofthe construction, and that further description is unnecessary. it issullicient to state that by manipulating the sliding bolt, the chuck 13and its supported core may be removed and replaced at will. and firmlyconnected to the table 27 or disconnected therefrom.

We claim 2 1. in combination, a chuck, a core supported thereon, a tableor support for the chuck, a stud carried by said table, an opening insaid chuck through which said stud projects and a locking bolt. carriedby the chuck for engaging the said stud.

2. In combination, achuck, a core supported thereon, a table or supportfor the chuck, a pair of diametrically arranged .studs carried by thetable, a pair of openings in the chuckthrough which said studs proect,and asliding bolt carried by the chuck engaging said studs,

3. In combination, a chuck, a core supported thereon. a table or supportfor the chuck. a pair of studs diametrically arranged on said table,notches in one side of said studs, a pair of openings in the chuckthrough which said studs'project, and a sliding bolt carried by thechuck arranged to be engaged with the notches in said studs.

4. In combination, a chuck, a core supported thereon, a table or supportfor the chuck, a notched post carried by the table and projectingthrough an opening in the chuck, and a sliding bolt having a wedgesurface carried by the chuck in position to engage the notch in saidstud.

5. .ln combination, a chuck, a core supported thereon, a table orsupport for the chuck, a pair of notched studs carried by that-able andprojecting throughopenings in the chuck, a sliding bolt carried by thechuckfia clearance notch near one end of said bolt for clearing one ofthe studs so positione'd that when brought into clearance position theopposite end of the bolt will clear the other stud.

6. In combination, a chuck, a core supported thereon, a table or supportfor the chuck, a sliding bolt for connecting the chuck and table orsupport. and a rack and pinion mechanism for operating said bolt.

PETER DE MATTIA.

BARTHULD DE MATTIA.

